Scammers have highjacked this number and are using it as their caller id. This practice is called "caller id spoofing". People who have received these calls report the scammers have heavy Indian accents and want to sell you prescription drugs. They want your personal information and credit card number.

This has been reported to the FCC. The FCC advises:

Do not give out any personal information. If you do talk to these people and are able to get any kind of information from them such as a name, real phone number or location call the FCC at 1-888-CALL FCC (1-888-225-5322) or on the web at http://www.fcc.gov/cgb/complaints.html and report the information.